<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            color: #333;
            min-height: 100vh;
            padding: 20px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            margin-bottom: 40px;
            color: white;
            padding: 20px;
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }
        
        .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
        }
        
        .exercises-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
        }
        
        .exercise-card {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            padding: 25px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .exercise-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
        }
        
        .exercise-title {
            font-size: 1.5rem;
            color: #2575fc;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #f0f0f0;
        }
        
        .counter-display {
            font-size: 4rem;
            text-align: center;
            font-weight: bold;
            color: #2575fc;
            margin: 20px 0;
            transition: all 0.3s ease;
        }
        
        .counter-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.2s ease;
            font-weight: 600;
        }
        
        .btn-primary {
            background: #2575fc;
            color: white;
        }
        
        .btn-primary:hover {
            background: #1a68e8;
            transform: scale(1.05);
        }
        
        .btn-danger {
            background: #ff4757;
            color: white;
        }
        
        .btn-danger:hover {
            background: #ff3742;
            transform: scale(1.05);
        }
        
        .btn-success {
            background: #2ed573;
            color: white;
        }
        
        .btn-success:hover {
            background: #25c75a;
            transform: scale(1.05);
        }
        
        .keyboard-hint {
            text-align: center;
            font-size: 0.9rem;
            color: #666;
            margin-top: 15px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #444;
        }
        
        input, textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 6px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        
        input:focus, textarea:focus {
            border-color: #2575fc;
            outline: none;
        }
        
        .search-results {
            margin-top: 15px;
            max-height: 200px;
            overflow-y: auto;
            border: 1px solid #e0e0e0;
            border-radius: 6px;
            padding: 10px;
        }
        
        .search-item {
            padding: 8px 12px;
            border-bottom: 1px solid #f0f0f0;
            cursor: pointer;
            transition: background 0.2s ease;
        }
        
        .search-item:hover {
            background: #f5f9ff;
        }
        
        .search-item:last-child {
            border-bottom: none;
        }
        
        .form-buttons {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .hover-box {
            height: 150px;
            background: #f8f9fa;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 20px 0;
            transition: all 0.3s ease;
            cursor: pointer;
            border: 2px dashed #ddd;
            font-weight: 600;
            color: #666;
        }
        
        .hover-box.active {
            background: #e3f2fd;
            border-color: #2575fc;
            color: #2575fc;
            transform: scale(1.02);
        }
        
        .click-box {
            height: 100px;
            background: #2575fc;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 20px 0;
            color: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            user-select: none;
        }
        
        .click-box:active {
            transform: scale(0.95);
        }
        
        .tooltip-container {
            position: relative;
            display: inline-block;
            margin-top: 20px;
        }
        
        .tooltip-trigger {
            padding: 10px 20px;
            background: #6a11cb;
            color: white;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
        }
        
        .tooltip {
            position: absolute;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            background: #333;
            color: white;
            padding: 8px 12px;
            border-radius: 4px;
            font-size: 0.9rem;
            white-space: nowrap;
            opacity: 0;
            transition: opacity 0.3s ease;
            pointer-events: none;
        }
        
        .tooltip::after {
            content: "";
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            border-width: 5px;
            border-style: solid;
            border-color: #333 transparent transparent transparent;
        }
        
        .tooltip-container:hover .tooltip {
            opacity: 1;
        }
        
        .highlight {
            background-color: #ffeb3b;
            transition: background-color 0.5s ease;
        }
        
        @media (max-width: 768px) {
            .exercises-container {
                grid-template-columns: 1fr;
            }
            
            .counter-buttons, .form-buttons {
                flex-direction: column;
            }
        }
    </style>